화학공학소재연구정보센터
Computers & Chemical Engineering, Vol.117, 420-432, 2018
A dynamical model of an aeration plant for wastewater treatment using a phenomenological based semi-physical modeling methodology
Diffused aeration is a sensitive process for wastewater treatment. Because of the nonlinearity and complexity of aerator dynamics due to microorganism metabolism and oxygen transfer, reliable mathematical models are needed to perform control-oriented tasks. To this end, in this study we develop a phenomenological based semi-physical model (PBSM) to predict and describe the dynamic behavior of the oxygen transfer in a diffused aeration process by means of a formal modeling methodology. This model will then be validated by using data from an aeration pilot plant. In this paper, we also show a lack of agreement in the literature in terms of the different available ways to represent the volumetric oxygen transfer coefficient k L a. Reasonable agreement between the developed model and plant data is found by considering a phenomenological approach of the k L a instead of considering many of the available empirical correlations in the literature. (C) 2018 Elsevier Ltd. All rights reserved.